Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania
Common bean (Phaseolus vulgaris L.) is the most important food grain legume crop in west Usambara highlands, but its yield remains below the potential largely due to nutrient deficiencies in the soils. To identify nutrients limiting bean production, on-farm diagnostic trials were carried out at nine...
| Autores principales: | , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
International Potash Institute
2015
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| Acceso en línea: | https://hdl.handle.net/10568/75958 |
| _version_ | 1855543491002630144 |
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| author | Baijukya, Frederick P. Mzanda, A. |
| author_browse | Baijukya, Frederick P. Mzanda, A. |
| author_facet | Baijukya, Frederick P. Mzanda, A. |
| author_sort | Baijukya, Frederick P. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Common bean (Phaseolus vulgaris L.) is the most important food grain legume crop in west Usambara highlands, but its yield remains below the potential largely due to nutrient deficiencies in the soils. To identify nutrients limiting bean production, on-farm diagnostic trials were carried out at nine farmer fields around Lushoto town in the short rainy season (vuli) from November 2013 until February 2014, though soil and leaf sample analyses. Bean leaf samples were analysed for macro and micronutrients, and the Diagnosis and Recommendation Integrated System (DRIS) was applied to rank nutrients according to their degree of limitation to bean production. The combination of different analyses indicated potassium (K) and phosphorus (P) deficiency as a major constraint for bean production in the Usambara Mountains. Soil analysis indicated deficiencies of the nutrients K and P and partly nitrogen (N), calcium (Ca) and magnesium (Mg). Bean growth and yield results revealed positive responses to fertilisers P and K. Analysis of bean leaf tissue indicated deficient nutrient concentrations levels for P, K and N when compared with critical nutrient concentration ranges. Application of P and K (and partially N) fertilisers increased leaf concentrations of the respective elements but depressed the concentrations of Ca, Mg andcopper (Cu). Ranking the obtained leaf nutrient concentrations with the DRIS approach, showed consistent results for nutrient deficiencies of P and K. Severe K deficiency became also visible at some fields through chlorotic and necrotic leaf symptoms. More work is required to establish the right combinations of deficient nutrients including establishing new fertilizer blends and their appropriate application rates. |
| format | Conference Paper |
| id | CGSpace75958 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | International Potash Institute |
| publisherStr | International Potash Institute |
| record_format | dspace |
| spelling | CGSpace759582023-02-15T06:39:34Z Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania Baijukya, Frederick P. Mzanda, A. common beans grain legumes nutrient deficiencies phaseolus vulgaris potassium Common bean (Phaseolus vulgaris L.) is the most important food grain legume crop in west Usambara highlands, but its yield remains below the potential largely due to nutrient deficiencies in the soils. To identify nutrients limiting bean production, on-farm diagnostic trials were carried out at nine farmer fields around Lushoto town in the short rainy season (vuli) from November 2013 until February 2014, though soil and leaf sample analyses. Bean leaf samples were analysed for macro and micronutrients, and the Diagnosis and Recommendation Integrated System (DRIS) was applied to rank nutrients according to their degree of limitation to bean production. The combination of different analyses indicated potassium (K) and phosphorus (P) deficiency as a major constraint for bean production in the Usambara Mountains. Soil analysis indicated deficiencies of the nutrients K and P and partly nitrogen (N), calcium (Ca) and magnesium (Mg). Bean growth and yield results revealed positive responses to fertilisers P and K. Analysis of bean leaf tissue indicated deficient nutrient concentrations levels for P, K and N when compared with critical nutrient concentration ranges. Application of P and K (and partially N) fertilisers increased leaf concentrations of the respective elements but depressed the concentrations of Ca, Mg andcopper (Cu). Ranking the obtained leaf nutrient concentrations with the DRIS approach, showed consistent results for nutrient deficiencies of P and K. Severe K deficiency became also visible at some fields through chlorotic and necrotic leaf symptoms. More work is required to establish the right combinations of deficient nutrients including establishing new fertilizer blends and their appropriate application rates. 2015-07 2016-07-04T14:24:07Z 2016-07-04T14:24:07Z Conference Paper https://hdl.handle.net/10568/75958 en Limited Access International Potash Institute Baijukya, F. & Mzanda, A. (2015). Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania. In: First National Potash Symposium in Tanzania: potassium for sustainable crop production and food security, (pp.1-16), 28-29 July, Dar es Salaam, Tanzania |
| spellingShingle | common beans grain legumes nutrient deficiencies phaseolus vulgaris potassium Baijukya, Frederick P. Mzanda, A. Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania |
| title | Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania |
| title_full | Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania |
| title_fullStr | Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania |
| title_full_unstemmed | Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania |
| title_short | Potassium deficiencies limit common bean (Phaseolus vulgaris L.) production in West Usambara, Northern Tanzania |
| title_sort | potassium deficiencies limit common bean phaseolus vulgaris l production in west usambara northern tanzania |
| topic | common beans grain legumes nutrient deficiencies phaseolus vulgaris potassium |
| url | https://hdl.handle.net/10568/75958 |
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